I've got experience with all three. I had the WASD with MX clears, and hated the ping. Traded it for a Filco with MX browns, and I love it. It definitely seems more solid than the WASD was, and it doesn't have any of that damned ping. I've heard that the MX clears are to blame for that, but still the Filco just seems like a much better keyboard overall.
But, I got a Leopold 750r for work, and it's better than both. I do also love the stock PBT caps, I'm considering leaving them on there. Extremely solid board, and it's got sweet LEDs in the caps lock and scroll lock keys.